:root {
  color-scheme: light dark;
  --paper: #ffffff;
  --ink: #1f2430;
  --muted: #5d6470;
  --line: #d5d9e0;
  --primary: #3b5ba9;
  --on-primary: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #16181d;
    --ink: #e8eaef;
    --muted: #a5abb6;
    --line: #3a3f49;
    --primary: #b4c5f2;
    --on-primary: #17264f;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.7 system-ui, "Noto Sans JP", sans-serif; }
main { max-width: 34rem; margin: 0 auto; padding: 3rem 1rem 4rem; }
h1 { font-size: 1.75rem; line-height: 1.3; margin: 0 0 .5rem; }
h2 { font-size: 1rem; margin: 2rem 0 .5rem; }
p { margin: .5rem 0; }
a { color: var(--primary); }
.actions { display: flex; flex-wrap: wrap; gap: .5rem; }
.button {
  flex: 1 1 10rem; display: flex; align-items: center; justify-content: center; min-height: 48px; padding: .5rem 1rem;
  color: var(--on-primary); background: var(--primary); border-radius: 8px; font-weight: 600; text-decoration: none;
}
.address {
  margin: .5rem 0; padding: .5rem .75rem; border: 1px solid var(--line); border-radius: 8px;
  font-family: ui-monospace, monospace; overflow-wrap: anywhere;
}
.muted { color: var(--muted); font-size: .9rem; }
ul.links { list-style: none; margin: .25rem 0; padding: 0; }
ul.links li { padding: .25rem 0; }
:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }